send a special request using AT command

[baobui]

I am writing a softphone program using huawei EM770 modem. How can I send a special request to the network using AT command?

For example, I can query my account balance by sending "*101#" from the phone, and the network provider will reply about my account balance. How can I do that with the modem?

Thank you very much

[wysota]

How is this related to Qt?

[Md. Kayesh]

How is this related to Qt?
In Symbian we can use AT command that is sent to modem. Is it possible in Qt?